@Article{466830,
     author = "Adam P. Balcerzak, Dorota Górecka, Elżbieta Rogalska",
     title = "Chosen Problems of the Euro Zone Enlargement",
     year =  2007,
     volume =  2,
     number =  ,
     journal =  Olsztyn Economic Journal,
     pages =  s. 1-11,
    }